R: Add and initialize dataframe column

addProperty {RMassBank}

R Documentation

Add and initialize dataframe column

Description

Adds a new column of a defined type to a data.frame and initializes it to a value. The advantage of doing this over adding it with $ or [,""] is that the case nrow(o) == 0 is adequately handled and doesn't raise an error.

Usage

addProperty(o, name, type, value = NA)

## S4 method for signature 'data.frame,character,character'
addProperty(o, name, type,
  value = NA)

Arguments

`o`	`data.frame` to add the column to
`name`	Name of the new column
`type`	Data type of the new column
`value`	Initial value of the new column (`NA` if not given)

Value

Expanded data frame.

Methods (by class)

o = data.frame,name = character,type = character: Add a new column to a data.frame

Author(s)

stravsmi

[Package RMassBank version 2.14.1 Index]